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US3178541A - Envelope construction for vacuumized electric switch including means internally providing capacitive voltage division between adjacent terminals - Google Patents

Envelope construction for vacuumized electric switch including means internally providing capacitive voltage division between adjacent terminals Download PDF

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Publication number
US3178541A
US3178541A US89696A US8969661A US3178541A US 3178541 A US3178541 A US 3178541A US 89696 A US89696 A US 89696A US 8969661 A US8969661 A US 8969661A US 3178541 A US3178541 A US 3178541A
Authority
US
United States
Prior art keywords
contact
switch
ring
annular
ceramic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US89696A
Other languages
English (en)
Inventor
Jennings Jo Emmett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jennings Radio Manufacturing Corp
Original Assignee
Jennings Radio Manufacturing Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jennings Radio Manufacturing Corp filed Critical Jennings Radio Manufacturing Corp
Priority to US89696A priority Critical patent/US3178541A/en
Priority to NL6501136A priority patent/NL6501136A/xx
Priority to AU54812/65A priority patent/AU5481265A/en
Priority to FR12660A priority patent/FR1439250A/fr
Application granted granted Critical
Publication of US3178541A publication Critical patent/US3178541A/en
Priority to BE663585A priority patent/BE663585A/xx
Priority to FR22305A priority patent/FR88246E/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/28—Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/66215—Details relating to the soldering or brazing of vacuum switch housings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H01H2033/66269—Details relating to the materials used for screens in vacuum switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H01H2033/66292—Details relating to the use of multiple screens in vacuum switches

Definitions

  • My invention relates to vacuumized electric switches and particularly to such switches in which the interior ,walls of the vacuumized shell are provided with shielding means to prevent harmful deposit and accumulation of tungsten vaporized from the switch contacts.
  • FIGS. 4 and are fragmentary views in vertical section and on an enlarged scale, each showing an arrangement of shielding rings or skirts.
  • My switch design lends itself to low inductance, high power applications where the outer conductor may be securely mounted in a large plate.
  • my switch comprises a vacuumized and hermetically tight envelope of generally cylindrical shape.
  • the body of the envelope is formed of two cylindrical ceramic shells 2 and 3 having grooves formed on the inside surfaces.
  • the shell may consist of a single piece and the grooves 4 cut or molded in the inside surface; or the shell may be a unitary structure built up of assembled rings 6, metalized on their edges and brazed together, the grooves 7 being formed on an inner edge, out or molded prior to assembly and brazing. Where the shell consists of a plurality of assembled rings 6, as shown best in FIG.
  • one ring of each pair of adjacent rings is provided with a rabbet 7 formed in its exterior surface at its united edge, and the other ring of the pair is formed with an annular flange 7" complementary to the rabbet.
  • My switch envelope body may be formed of differently grooved shells or only of one type, but for illustration in FIG. 1, I have shown two types 2 and 3, hermetically joined by means of metallized edges to a metal or conductive feed-out ring 8 having one or more lugs 9 for circuit connections.
  • a massive copper contact stud 21 capped at its lower or contact end with a disk of tungsten 22.
  • a heavy screw 23 threaded through the closure plate and into the stud secures the connector plate 24 on top of the switch envelope.
  • brackets 26 integral with feed-out ring 8 on its inner edge and adjacent the inside surface of the shell 2 is a tungsten contact ring 27, the lower face of which is in planar alignment with the lower face of the tungsten disk 22.
  • the contact ring concentrically surrounds the disk 22 to define therewith an annular passageway between the interiors of the shells 2 and 3 which is open when the switch is open but is blocked when the switch is closed.
  • Means are provided for shorting between the contact stud 21 and the contact ring 27 with a wide area of engaging surfaces so that heavy currents can be handled through my switch with a minimum of sparking, heating and volatilizing of tungsten contact surfaces. This is accomplished by mounting an annular shorting plate 28 of tungsten on a steel backing plate 29 and the two on a central axially movable stern extending out of the envelope, and operated as desired to open and close the switch contacts by an external operator means. It should be noted that when the shorting plate 28 engages both the stud 21 and contact ring 27, the annular space therebetween is blocked, thus effectively isolating the interior of the upper shell 2 from the interior of the lower shell 3.
  • a copper junction block 36 threads over the inner end of the shaft and provides a seat for the dielectric pillar 37 of ceramic or sapphire, on the upper end of which is a copper head 38 into which the cap screw 39 is threaded.
  • the screw body is loose in the plate 29; and its head is spaced above the plate and within the central opening of the annular shorting plate, so that a slight tipping of the plate 29 on the head may occur when the switch is closed to distribute and equalize the pressure between the contacting surfaces and permit accomodation for minor irregularities of the contact surfaces.
  • a coil spring 41 in the head around the cap screw interposes a resilient pressure against the plate to further equalize the pressure of the shorting plate against the contacts 22 and 27.
  • a generally cylindrical metal bellows 42 is brazed at its lower end to the base of the bearing 33; and at its upper end to the junction block 36.
  • Cylindrical corona shields 43 and 44 are arranged on the head 38 and junction block 36 respectively to reduce electrostatic stress on the stem; and a third shield 36 extends about the junction block close to the lower closure plate 18 to protect the bellows from tungsten particles generated by the switch contacts. It will be noted that the bellows are isolated physically from the contacts in view of the shielding. Also the contacts are isolated electrically from the bellows in view of the dielectric coupling 37 in the operating shaft.
  • the drawing of necessity exaggerates the relative proportions. Excellent results are obtained if the grooves are .050" to .100 wide with a depth of 7 to /1". Between abutting rings 6 in the upper part of FIG. 1, the groove may be ground or molded all on one ring or half in each abutting face.
  • the grooves may be formed in a molding operation or cut preferably by grinding, in either case with as smooth a surface as possible.
  • FIG. 3 drawn to a larger scale than FIG. 1, better discloses the metallized hermetic joint 51 between successive rings 6 of the shell.
  • the interior of the ⁇ shell 52 is metallized in narrow bands 53, and thin copper skirts 54 are brazed thereto in overlapping non-contacting relation as shown.
  • the shell 56 is grooved, and thin overlapping flanged skirts 57 are mounted in the grooves as shown.
  • An electric switch comprising a ceramic annular body in two parts forming the interior of the switch, a conductive ring interposed between and hermetically uniting adjacent edges of the parts, an annular contact ring concentric with the ceramic body on the inside thereof and conductively supported on the interposed conductive ring adjacent the inner periphery of said ceramic body parts, a conductive plate hermetically closing one end of the ceramic body, a massive contact stud fixed concentrically on the conductive plate within one of said two parts of the ceramic annular body and extending axially into concentric planar alignment with the contact ring and therewith defining an annular passageway communicating the interiors of said two parts of the ceramic annular body when the switch is open, a cap including a bearing hermetically closing the opposite end of the ceramic body, an operator stem slidably arranged in said bearing and including a non-conductive portion adjacent its inner end and having a corona shield mounted thereon to each side of said dielectric portion, a bellows hermetically interposed between the cap and the stem
  • each groove extends around the rings interior surface at its united edge.
  • An electric switch comprising a pair of axially aligned dielectric members, a first fixed contact assembly hermetically interposed between the adjacent ends of the dielectric members and proving an annular contact within the envelope intermediate its ends and terminal lugs outside the envelope, a second fixed contact assembly hermetically closing one end of the envelope and including an end plate sealed across the end of one of said dielectric members remote from the first fixed contact assembly and a stud contact concentrically arranged within the annular contact to provide a pair of radially spaced fixed contact surfaces in planar alignment, an annular shorting plate within the envelope movable to make and break a circuit between the pair of radially spaced fixed contact surfaces, actuator means including a dielectric stern within the envelope supporting the annular shorting plate, a closure plate assembly hermetically sealing the end of the envelope associated with said actuator means and including an expansible bellow movably supporting the dielectric stern, and an auxiliary cylindrical housing surrounding the bellows, and a shield plate mounted on the actuator means within the envelope and interposed between the annular

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US89696A 1961-02-16 1961-02-16 Envelope construction for vacuumized electric switch including means internally providing capacitive voltage division between adjacent terminals Expired - Lifetime US3178541A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US89696A US3178541A (en) 1961-02-16 1961-02-16 Envelope construction for vacuumized electric switch including means internally providing capacitive voltage division between adjacent terminals
NL6501136A NL6501136A (es) 1961-02-16 1965-01-29
AU54812/65A AU5481265A (en) 1961-02-16 1965-02-05 Vacuumized electric switch
FR12660A FR1439250A (fr) 1961-02-16 1965-04-09 Interrupteur sous vide
BE663585A BE663585A (es) 1961-02-16 1965-05-07
FR22305A FR88246E (fr) 1961-02-16 1965-06-25 Interrupteur sous vide

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US89696A US3178541A (en) 1961-02-16 1961-02-16 Envelope construction for vacuumized electric switch including means internally providing capacitive voltage division between adjacent terminals
NL6501136A NL6501136A (es) 1961-02-16 1965-01-29
AU54812/65A AU5481265A (en) 1961-02-16 1965-02-05 Vacuumized electric switch
FR12660A FR1439250A (fr) 1961-02-16 1965-04-09 Interrupteur sous vide

Publications (1)

Publication Number Publication Date
US3178541A true US3178541A (en) 1965-04-13

Family

ID=27423481

Family Applications (1)

Application Number Title Priority Date Filing Date
US89696A Expired - Lifetime US3178541A (en) 1961-02-16 1961-02-16 Envelope construction for vacuumized electric switch including means internally providing capacitive voltage division between adjacent terminals

Country Status (5)

Country Link
US (1) US3178541A (es)
AU (1) AU5481265A (es)
BE (1) BE663585A (es)
FR (1) FR1439250A (es)
NL (1) NL6501136A (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368049A (en) * 1965-05-07 1968-02-06 Jennings Radio Mfg Corp High current radio frequency switch
US4267415A (en) * 1977-10-06 1981-05-12 Electric Power Research Institute Current limiter vacuum envelope
DE4447391C1 (de) * 1994-12-23 1996-06-05 Siemens Ag Vakuumschalter
US20170287662A1 (en) * 2016-03-30 2017-10-05 Beijing Orient Vacuum Electric Co.,Ltd. Insulating housing with integrated functions and manufacturing method therefor
WO2018028918A1 (de) * 2016-08-09 2018-02-15 Siemens Aktiengesellschaft Keramikisolator für vakuumschaltröhren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE563140C (de) * 1927-07-19 1932-11-03 Sigwart Ruppel Dipl Ing Elektrischer Schalter mit in einer luftleeren Kammer angeordneten Kontakten
DE569123C (de) * 1933-01-30 Bbc Brown Boveri & Cie Hochvakuumschalter
GB389463A (en) * 1930-09-07 1933-03-06 Siemens Ag A vacuum electric switch
USRE21087E (en) * 1934-02-23 1939-05-16 Vacuum switch
US2976382A (en) * 1959-06-29 1961-03-21 Gen Electric Arc extinguishing structure for an electric circuit interrupter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE569123C (de) * 1933-01-30 Bbc Brown Boveri & Cie Hochvakuumschalter
DE563140C (de) * 1927-07-19 1932-11-03 Sigwart Ruppel Dipl Ing Elektrischer Schalter mit in einer luftleeren Kammer angeordneten Kontakten
GB389463A (en) * 1930-09-07 1933-03-06 Siemens Ag A vacuum electric switch
USRE21087E (en) * 1934-02-23 1939-05-16 Vacuum switch
US2976382A (en) * 1959-06-29 1961-03-21 Gen Electric Arc extinguishing structure for an electric circuit interrupter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368049A (en) * 1965-05-07 1968-02-06 Jennings Radio Mfg Corp High current radio frequency switch
US4267415A (en) * 1977-10-06 1981-05-12 Electric Power Research Institute Current limiter vacuum envelope
DE4447391C1 (de) * 1994-12-23 1996-06-05 Siemens Ag Vakuumschalter
US20170287662A1 (en) * 2016-03-30 2017-10-05 Beijing Orient Vacuum Electric Co.,Ltd. Insulating housing with integrated functions and manufacturing method therefor
US10134547B2 (en) * 2016-03-30 2018-11-20 Beijing Orient Vacuum Electric Co., Ltd. Insulating housing with integrated functions and manufacturing method therefor
WO2018028918A1 (de) * 2016-08-09 2018-02-15 Siemens Aktiengesellschaft Keramikisolator für vakuumschaltröhren
CN109564835A (zh) * 2016-08-09 2019-04-02 西门子股份公司 用于真空开关管的陶瓷绝缘子
US10840044B2 (en) 2016-08-09 2020-11-17 Siemens Aktiengesellschaft Ceramic insulator for vacuum interrupters

Also Published As

Publication number Publication date
BE663585A (es) 1965-11-08
FR1439250A (fr) 1966-05-20
NL6501136A (es) 1966-08-01
AU5481265A (en) 1966-08-11

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